ABAP Select data from SAP table COBJ_DISPL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP COBJ_DISPL table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to COBJ_DISPL. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the COBJ_DISPL table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_COBJ_DISPL TYPE STANDARD TABLE OF COBJ_DISPL,
      WA_COBJ_DISPL TYPE COBJ_DISPL,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <COBJ_DISPL> TYPE COBJ_DISPL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_COBJ_DISPL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM COBJ_DISPL
  INTO TABLE IT_COBJ_DISPL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COBJ_DISPL
*  INTO TABLE @DATA(IT_COBJ_DISPL2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_COBJ_DISPL INDEX 1 INTO DATA(WA_COBJ_DISPL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_COBJ_DISPL ASSIGNING <COBJ_DISPL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COBJ_DISPL>-BTCSERVER = 1.
<COBJ_DISPL>-TIMSTMPDT = 1.
<COBJ_DISPL>-TIMSTMPTM = 1.
<COBJ_DISPL>-TRCTIMSTDT = 1.
<COBJ_DISPL>-TRCTIMSTTM = 1.

ENDLOOP.

LOOP AT IT_COBJ_DISPL INTO WA_COBJ_DISPL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COBJ_DISPL-TRCCHUSR, sy-vline,
  WA_COBJ_DISPL-OPMODE, sy-vline,
  WA_COBJ_DISPL-OPMODTSTDT, sy-vline,
  WA_COBJ_DISPL-OPMODTSTTM, sy-vline,
  WA_COBJ_DISPL-OPMODCHUSR, sy-vline,
  WA_COBJ_DISPL-OBJ_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COBJ_DISPL you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_COBJ_DISPL TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_COBJ_DISPL INTO WA_COBJ_DISPL.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_COBJ_DISPL_STR, 
BTCSERVER TYPE STRING,
TIMSTMPDT TYPE STRING,
TIMSTMPTM TYPE STRING,
TRCTIMSTDT TYPE STRING,
TRCTIMSTTM TYPE STRING,
TRCCHUSR TYPE STRING,
OPMODE TYPE STRING,
OPMODTSTDT TYPE STRING,
OPMODTSTTM TYPE STRING,
OPMODCHUSR TYPE STRING,
OBJ_TEXT TYPE STRING,
TRC_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COBJ_DISPL_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_COBJ_DISPL_STR-BTCSERVER sy-vline 
WA_COBJ_DISPL_STR-TIMSTMPDT sy-vline 
WA_COBJ_DISPL_STR-TIMSTMPTM sy-vline 
WA_COBJ_DISPL_STR-TRCTIMSTDT sy-vline 
WA_COBJ_DISPL_STR-TRCTIMSTTM sy-vline 
WA_COBJ_DISPL_STR-TRCCHUSR sy-vline 
WA_COBJ_DISPL_STR-OPMODE sy-vline 
WA_COBJ_DISPL_STR-OPMODTSTDT sy-vline 
WA_COBJ_DISPL_STR-OPMODTSTTM sy-vline 
WA_COBJ_DISPL_STR-OPMODCHUSR sy-vline 
WA_COBJ_DISPL_STR-OBJ_TEXT sy-vline 
WA_COBJ_DISPL_STR-TRC_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.